Is there any bitcoin cash offline wallet? I really do not know for sure but maybe try to use coinbase or hodl it on exchangers. I'm really not sure about bitcoincash because I refer it as a shitcoin, really.

Which wallet is recommended to store bitcoin cash on an offline computer? Are any of them known to be secure/not secure?

I only used Electron Cash Wallet a few times and had no problems, but I would probably go for Bitcoin ABC if for some reason I had to store a really huge amount for a long time.

Do I have to download the whole blockchain to use bitcoin ABC? Meant to ask if there was a lightweight bitcoin cash wallet. I thought about electrum cash, but I'm afraid it would mess up my BTC electrum wallet?

Which wallet is recommended to store bitcoin cash on an offline computer? Are any of them known to be secure/not secure?

I only used Electron Cash Wallet a few times and had no problems, but I would probably go for Bitcoin ABC if for some reason I had to store a really huge amount for a long time.

Do I have to download the whole blockchain to use bitcoin ABC? Meant to ask if there was a lightweight bitcoin cash wallet. I thought about electrum cash, but I'm afraid it would mess up my BTC electrum wallet?

Bitcoin ABC is a full node implementation so, as far as I know - yes, full blockchain download required. And if lightweight wallet is all you need... electron cash worked for me flawlessly, but I have to admit - I uninstalled my Electrum Bitcoin Wallet first so I can't confirm they can both work fine in the same time on the same pc.

I am looking to securely generate and store private keys on an offline computer. Why would I need/want to download the entire blockchain? (Am not sure how big it is, didn't see from the BCH blockchain explorer how to determine its size)

I am looking to securely generate and store private keys on an offline computer. Why would I need/want to download the entire blockchain? (Am not sure how big it is, didn't see from the BCH blockchain explorer how to determine its size)

Use bitcoin abc just like you are downloading the bitcoin core for the bitcoin original, because that makes you able to run the nodes in your computer, as long as which can be more secured than electron wallet.